#### Guided Li deposition by surface micro-patterning of Li metal electrode = 리튬 금속 전극 표면 마이크로 패터닝을 이용한 리튬 도금 형상 제어

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Uncontrolled Li deposition of Li metal electrode have hampered the evolution of Li metal electrode-based next generation lithium batteries. In this work, we report a guided Li deposition with cubic micro-patterns carved on Li metal electrode surface. The micro-patterned Li (MP-Li) electrodes with two different dimensions (6 and $40\mu m$) are fabricated by a stamping method. Li deposition is preferentially initiated on the top edge for the smaller cavity and the bottom side for the larger cavity. The guided Li depositions lead to significantly enhanced cycling stability due to the more uniform utilization of the Li metal electrodes. The guiding effect is more pronounced for the larger pattern, because the large Li deformation during the pattern formation leads to a large contrast in the SEI resistance between top surface and cavity surface. The Li/LFP cell with the MP-Li electrode shows the longer cycling stability and lower over-potential compared with un-patterned control, demonstrating that the guided Li deposition induced by surface pattern can provide an effective academic strategy for high performance Li metal batteries.
Kim, Hee-Takresearcher김희탁researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2018.2,[iv, 34 p. :]

Keywords

Lithium metal batteries▼aLithium metal electrode▼aMicro-patterns▼aLithium electrodeposition▼aSolid electrolyte interface; 리튬 금속 전지▼a리튬 금속 음극▼a마이크로-패턴▼a리튬 도금▼a전극 전해질 계면

URI
http://hdl.handle.net/10203/266316